T15 Microphone Preamp

The SCA T15 is a transformerless microphone preamplifier designed around the excellent THAT Corporation 1512 and 1646 ICs. These state-of-the-art chips enable the performance of the T15 to approach that of sophisticated discrete and hybrid designs (such as the C84) while using far fewer components. While it does not have the same headroom and output drive capability as the C84, the T15 has similar noise and distortion specifications and excels in the same applications. Unlike the C84, the T15 has a small number of components, requires no adjustment or trimming, and is very easy to assemble.

Features

The T15 can provide 70dB of gain, more than enough gain for most applications, especially with modern high-output condenser microphones.

Stepped Gain Control

A 12 position Grayhill switch provides accurate and repeatable gain settings in 5dB steps from 15dB to 70dB.

Gain Trim

Since 5dB is often too big a gain step, the T15 also has a gain trim control which provides up to 6dB of cut at any gain setting. This allows very fine adjustment of gain between steps. This control can also be configured as a full fader.

Phase Reverse

Inverts the signal phase.

Phantom Switch

Slow-rise phantom power minimizes pops and thumps.

Neutrik Connectors

High quality PC mount connectors eliminate cabling and ease assembly.

Dual DC Servos

Similar to the C84, the T15 employs two DC servo circuits.

Flexible Power Supply

On-board voltage regulators can accommodate power supplies from +/-15VDC up to +/-35VDC, allowing the use of op-amps with +/-24VDC requirements. Local regulation also keeps inter-channel crosstalk extremely low when multiple preamps share the same power supply.